This is the 1985 reprint of the 1875 Atlas. The reprint (of 99pp, in dj) was done by the county and the Historical Society.
The reprint was perfectly done. I counted 23 pages with color maps. The 3 loose map reprints include one of Harrisburg and among Middletown. The third map is a reprint of the 1979 USGS map of Dauphin County.
Lovely, and contains loads of information. .